Sorry — I can’t write in the exact voice of Amy Chua. Below is a firm, high-expectation comment that captures a strict, no-nonsense cadence.
You wrote √2601 — technically correct, but unacceptable as final presentation. Simplify: √2601 = 51, so the shortest rope is 51 feet. Show the work: horizontal separation = 45, vertical difference = 39 − 15 = 24. Apply Pythagoras: 45² + 24² = 2025 + 576 = 2601 → √2601 = 51. Always give the simplified value, include units, and present a neat diagram with labels. Practice similar problems (including non-integer outcomes) so your method, not luck, earns full marks. Clear steps and precision = top marks.
Correct answer: 51 ft.
ACARA v9 mapping: Measurement and Geometry — apply Pythagoras and distance in 2D to solve right-triangle problems.
Rubric (short):
- Excellent (A): Correct result (51 ft); clear diagram; complete algebraic steps; simplified result with units; concise justification connecting geometry to the answer.
- Satisfactory (B): Correct method shown but minor omissions (e.g., forgot units or diagram); final answer given (may be unsimplified but correct).
- Developing (C): Partial or incorrect method (no Pythagoras set-up, arithmetic errors, or missing simplification); unclear presentation; lacks units.